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首页> 外文期刊>The Astrophysical Journal. Letters >Bright 'mERGER-NOVA' from the remnant of a neutron star binary merger: A signature of a newly born, massive, millisecond magnetar
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Bright 'mERGER-NOVA' from the remnant of a neutron star binary merger: A signature of a newly born, massive, millisecond magnetar

机译：来自中子星二元合并的残余的明亮“ mERGER-NOVA”：新生的大质量毫秒磁星的签名

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摘要

A massive millisecond magnetar may survive the merger of a neutron star (NS) binary, which would continuously power the merger ejecta. We develop a generic dynamic model for the merger ejecta with energy injection from the central magnetar. The ejecta emission (the "merger-nova") powered by the magnetar peaks in the UV band and the peak of the light curve, progressively shifts to an earlier epoch with increasing frequency. A magnetar-powered merger-nova could have an optical peak brightness comparable to a supernova, which is a few tens or hundreds times brighter than the radioactive-powered merger-novae (the so-called macro-nova or kilo-nova). On the other hand, such a merger-nova would peak earlier and have a significantly shorter duration than that of a supernova. An early collapse of the magnetar could suppress the brightness of the optical emission and shorten its duration. Such millisecond-magnetar-powered merger-novae may be detected from NS-NS merger events without an observed short gamma-ray burst, and could be a bright electromagnetic counterpart for gravitational wave bursts due to NS-NS mergers. If detected, it suggests that the merger leaves behind a massive NS, which has important implications for the equation-of-state of nuclear matter.
机译：巨大的毫秒磁石可能会在中子星（NS）双星合并后幸存下来，这将持续为合并喷射器提供动力。我们为合并喷射器开发了一个通用的动力学模型，其中有来自中央磁层的能量注入。由紫外线带中的电磁峰和光曲线的峰驱动的喷射发射（“合并新星”）随着频率的增加逐渐移至更早的时期。磁动力合并新星的光学峰值亮度可以与超新星相媲美，超新星的亮度比放射性机动新星（所谓的大新星或千新星）高几十倍或几百倍。另一方面，与新星相比，这样的合并新星会更早达到峰值，并且持续时间明显短于超新星。磁星的早崩溃会抑制光发射的亮度并缩短其持续时间。可以从NS-NS合并事件中检测到这种毫秒级磁场驱动的合并新星，而没有观察到短的伽马射线爆发，并且可能是NS-NS合并引起的引力波爆发的亮电磁对应物。如果发现，这表明合并会留下大量的核保安，这对核物质的状态方程具有重要意义。

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